December 2011
... be a meteor shower known as the Geminid shower. The best time to watch for the meteors will be in the evening of 13 th and the morning of 14th December when the shower should be at its peak. However some should be visible all night. Unfortunately the Moon will be a waning gibbous crescent just 20° s ...
... be a meteor shower known as the Geminid shower. The best time to watch for the meteors will be in the evening of 13 th and the morning of 14th December when the shower should be at its peak. However some should be visible all night. Unfortunately the Moon will be a waning gibbous crescent just 20° s ...
Minutes SSWG_2 - Space Astronomy Laboratory
... - Field effects (off-axis blaze shifts). - Scattered light effects. One other major issue is the mechanical implications of an articulated spectrograph camera, required for VPH gratings which operate under the Bragg condition (angles of incidence and refraction equal). Some of these problems will ne ...
... - Field effects (off-axis blaze shifts). - Scattered light effects. One other major issue is the mechanical implications of an articulated spectrograph camera, required for VPH gratings which operate under the Bragg condition (angles of incidence and refraction equal). Some of these problems will ne ...
Deformable Mirrors Lecture 8
... – Shape of mirror surface when you push just one actuator (like a Greens function) – Can optimize your AO system with a particular influence function, but performance is pretty forgiving Page 8 ...
... – Shape of mirror surface when you push just one actuator (like a Greens function) – Can optimize your AO system with a particular influence function, but performance is pretty forgiving Page 8 ...
F P US R
... committee sought to identify important scientific opportunities that can be studied uniquely in the RMS windows or where RMS observations are an important component of the multi-wavelength synergism. The RMS facilities will continue to contribute substantially to the study of the Sun and solar syste ...
... committee sought to identify important scientific opportunities that can be studied uniquely in the RMS windows or where RMS observations are an important component of the multi-wavelength synergism. The RMS facilities will continue to contribute substantially to the study of the Sun and solar syste ...
Spring 2015 Mercury - Astronomical Society of the Pacific
... The Eagle Nebula wasn’t new to astronomers. Telescopic observations of M16 go back to 1745 when the Swiss astronomer JeanPhilippe de Chéseaux discovered it as a star cluster. Charles Messier observed it in 1764 and noted a nebula surrounding the cluster. Using a much more powerful telescope, Caroli ...
... The Eagle Nebula wasn’t new to astronomers. Telescopic observations of M16 go back to 1745 when the Swiss astronomer JeanPhilippe de Chéseaux discovered it as a star cluster. Charles Messier observed it in 1764 and noted a nebula surrounding the cluster. Using a much more powerful telescope, Caroli ...
Calibration of Non-Spatially-Filtered Data in Optical
... • If we turn our telescopes to overlooked nearby stars with white dwarf companions (like Mira A when it dies), we should be able to find many systems that formed like Mira B. • So… We discovered that around Mira B is a new kind of protoplanetary disk, formed from the wind of a dying star. This is th ...
... • If we turn our telescopes to overlooked nearby stars with white dwarf companions (like Mira A when it dies), we should be able to find many systems that formed like Mira B. • So… We discovered that around Mira B is a new kind of protoplanetary disk, formed from the wind of a dying star. This is th ...
IRTF Adaptive Optics System Review
... •Operation with NSFCAM(two plate scales) and SPEX •Optics that allow easily removing the AO optics from the beam •Support of differential track guide/science objects ...
... •Operation with NSFCAM(two plate scales) and SPEX •Optics that allow easily removing the AO optics from the beam •Support of differential track guide/science objects ...
story of telescope
... Historical changes are slow and occur over a period of time, and the history of ideas in human thought is no exception. But one particular event stands out above all in the history of science. In July 1609, Galileo Galilei used an instrument to look at stars, and the discoveries he reported changed ...
... Historical changes are slow and occur over a period of time, and the history of ideas in human thought is no exception. But one particular event stands out above all in the history of science. In July 1609, Galileo Galilei used an instrument to look at stars, and the discoveries he reported changed ...
The Infrared Imaging Spectrograph (IRIS) for TMT: Instrument
... The NFIRAOS adaptive optics system will often use laser guide stars and perform a multi-conjugate analysis of the atmosphere. This allows it to correct stellar images over a full 2 arcminute field, but the LGS AO system itself is blind to several of its own corrective modes. In particular, field dis ...
... The NFIRAOS adaptive optics system will often use laser guide stars and perform a multi-conjugate analysis of the atmosphere. This allows it to correct stellar images over a full 2 arcminute field, but the LGS AO system itself is blind to several of its own corrective modes. In particular, field dis ...
X-Ray Telescopes
... identification of a remnant’s compact object. None of these types of studies is readily undertaken with nonimaging instruments. Other imaging approaches employing such devices as modulation collimators or scanned, tightly collimated detectors provide much poorer resolution (∼1 arcmin.) than that ava ...
... identification of a remnant’s compact object. None of these types of studies is readily undertaken with nonimaging instruments. Other imaging approaches employing such devices as modulation collimators or scanned, tightly collimated detectors provide much poorer resolution (∼1 arcmin.) than that ava ...
Staring Back to Cosmic Dawn - UC-HiPACC
... At the present day, only a few galaxies lie between the peaks of the blue and red galaxies, in the so-called “green valley” (so named because green wavelengths are midway between red and blue in the spectrum). A blue galaxy that is vigorously forming stars will become green within a few hundred mill ...
... At the present day, only a few galaxies lie between the peaks of the blue and red galaxies, in the so-called “green valley” (so named because green wavelengths are midway between red and blue in the spectrum). A blue galaxy that is vigorously forming stars will become green within a few hundred mill ...
Stars from the NE - Aberdeen Astronomical Society
... focal length, 4 foot diameter, instrument using the front view into a slightly inclined mirror. Ramage’s telescope erected at Greenwich, from Pearson’s Astronomy Ramage began making large telescopes around 1810 and his attempts were noted across the country. One of Ramage’s instruments was offered t ...
... focal length, 4 foot diameter, instrument using the front view into a slightly inclined mirror. Ramage’s telescope erected at Greenwich, from Pearson’s Astronomy Ramage began making large telescopes around 1810 and his attempts were noted across the country. One of Ramage’s instruments was offered t ...
Seeing Earth`s Orbit in the Stars: Parallax and Aberration
... a yearly orbit around the Sun, then the stars should also display a parallactic wobble with a period of one year. (The AstronomicalParallax2D program illustrates this annual parallax for an object in ...
... a yearly orbit around the Sun, then the stars should also display a parallactic wobble with a period of one year. (The AstronomicalParallax2D program illustrates this annual parallax for an object in ...
Messages for the plenary session
... Highest Priority is Preparing for next Agency Reviews – CD3a and FDR late in 2013 – Update/upgrade Project Management Control System Prolonged D&D to “Time is money” construction ...
... Highest Priority is Preparing for next Agency Reviews – CD3a and FDR late in 2013 – Update/upgrade Project Management Control System Prolonged D&D to “Time is money” construction ...
AMiBA: Hexapod Commissioning and Pointing
... 2006: Improvement in optical pointing performance with interpolation table azimuth signature ...
... 2006: Improvement in optical pointing performance with interpolation table azimuth signature ...
LARRY MARSCHALL CLEA
... Major Project: A non Modular approach A Virtual Observatory •Computer speed and storage so much higher than when this project began that there is practically no limit to what we can simulate in real time. •Huge amount of data available and easily accessible ...
... Major Project: A non Modular approach A Virtual Observatory •Computer speed and storage so much higher than when this project began that there is practically no limit to what we can simulate in real time. •Huge amount of data available and easily accessible ...
T1000700-v2 Transmon Telescope Mirror Test Procedure
... Set the focus of Autocollimator #1 to infinity focus by using the corner cube, and project the beam toward Telescope Primary Mirror. Place the Telescope Secondary Mirror at the approximate focal position by observing the focused spot of the projected autocollimator beam. 3.7.1 Spherical Secondary Mi ...
... Set the focus of Autocollimator #1 to infinity focus by using the corner cube, and project the beam toward Telescope Primary Mirror. Place the Telescope Secondary Mirror at the approximate focal position by observing the focused spot of the projected autocollimator beam. 3.7.1 Spherical Secondary Mi ...
Telescopes
... Interferometry can also be done with visible light but is much more difficult due to shorter wavelengths ...
... Interferometry can also be done with visible light but is much more difficult due to shorter wavelengths ...
271–274
... interferometry it is shown that the recent signal-to-noise ratio estimate for the so called bispectrum, due to Wirnitzer (1985), does not possess the right limit when photon statistics is unimportant. In this wave-limit, which is true for bright sources, his calculations over-estimate the signal-to- ...
... interferometry it is shown that the recent signal-to-noise ratio estimate for the so called bispectrum, due to Wirnitzer (1985), does not possess the right limit when photon statistics is unimportant. In this wave-limit, which is true for bright sources, his calculations over-estimate the signal-to- ...
Adaptive Optics Update
... • At CoDR MCAO performance calculations assumed a 1.5 x DL combined beam quality for Laser + BTO + LLT • PDR revised beam quality error budget gives 1.73 x DL (resp. 1.58 x DL) for: – Use of 1.2 x DL laser beams – The LLT meeting its image quality specification (resp. goal) – Use of premium quality ...
... • At CoDR MCAO performance calculations assumed a 1.5 x DL combined beam quality for Laser + BTO + LLT • PDR revised beam quality error budget gives 1.73 x DL (resp. 1.58 x DL) for: – Use of 1.2 x DL laser beams – The LLT meeting its image quality specification (resp. goal) – Use of premium quality ...
James Webb Space Telescope
The James Webb Space Telescope (JWST), previously known as Next Generation Space Telescope (NGST), is a space observatory under construction and scheduled to launch in October 2018. The JWST will offer unprecedented resolution and sensitivity from long-wavelength visible to the mid-infrared, and is a successor instrument to the Hubble Space Telescope and the Spitzer Space Telescope. The telescope features a segmented 6.5-meter (21 ft) diameter primary mirror and will be located near the Earth–Sun L2 point. A large sunshield will keep its mirror and four science instruments below 50 K (−220 °C; −370 °F).JWST's capabilities will enable a broad range of investigations across the fields of astronomy and cosmology. One particular goal involves observing some of the most distant objects in the Universe, beyond the reach of current ground and space based instruments. This includes the very first stars, the epoch of reionization, and the formation of the first galaxies. Another goal is understanding the formation of stars and planets. This will include imaging molecular clouds and star-forming clusters, studying the debris disks around stars, direct imaging of planets, and spectroscopic examination of planetary transits.In gestation since 1996, the project represents an international collaboration of about 17 countries led by NASA, and with significant contributions from the European Space Agency and the Canadian Space Agency. It is named after James E. Webb, the second administrator of NASA, who played an integral role in the Apollo program.The JWST has a history of major cost overruns and delays. The first realistic budget estimates were that the observatory would cost $1.6 billion and launch in 2011. NASA has now scheduled the telescope for a 2018 launch. In 2011, the United States House of Representatives voted to terminate funding, after about $3 billion had been spent and 75 percent of its hardware was in production. Funding was restored in compromise legislation with the US Senate, and spending on the program was capped at $8 billion. As of December 2014, the telescope remained on schedule and within budget, but at risk of further delays.